I picked up a Yamaha F-345 from a colleague for $50. I had been knocked at the nut, so it had a chunk out of the nut at the high E (first string). The folks at Yamaha were amazing, and shipped me out a new nut and a spare for something like $12 all up.
Replacing the nut simply took some sanding off the bottom of the nut to get it to the height of the original and a bit of resorcinol glue to hold it lightly in place.
Lastly, since the belly below the bridge was somewhat raised (it may have been stored somewhere damp under higher string tension), I ended up flattening that belly substantially by placing it under pressure Continue reading